JP2962002B2 - Outboard cowling - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a cowling for an outboard motor,
In particular, it relates to a cowling structure for supplying air to an engine.

[0002]

2. Description of the Related Art In general, in an outboard motor, a cowling that covers an engine, particularly a top cowl, is provided with an intake cylinder that rises upward, and the intake cylinder is covered with an air intake cover, and water flows directly into the cowling from the intake cylinder. To prevent them from doing so.

[0003]

However, in such a structure in which the upper part of the intake cylinder is covered with the air intake cover, the air intake chamber having an appropriate height is formed below the air intake cover. It is necessary to provide high bosses and ribs on the inner surface of the intake cover.
Therefore, the above-mentioned air intake cover has sink marks on the high bosses and rib forming portions at the time of its production, and the appearance is impaired. Problem.

In view of the above, the present invention makes it possible to easily separate water and air without impairing the appearance of the air intake cover, and to make the inside of the intake chamber invisible from the outside. The purpose is to get the outboard motor cowling.

[0005]

According to the present invention, an intake cylinder projects from a top wall of a top cowling that covers an engine of an outboard motor, and a rear intake cover disposed above the intake cylinder is provided at a rear portion of an intake cover. A louver composed of a plurality of guide plates whose inner ends are bent downward is attached to the formed intake opening by bolts for attaching an air intake cover.

[0006]

During the operation of the outboard motor, the air flowing into the intake chamber from the intake opening provided in the air intake cover is bent downward by the louver, and when the flow velocity decreases, water and air are separated. Only air is led to the engine via the intake cylinder. Therefore, water is reliably prevented from flowing into the top cowl from the intake cylinder. In addition, since the louvers are mounted together with the air intake cover and the air intake cover mounting bolts, there is no need to provide a high boss or the like on the air intake cover, so that sinks and the like do not occur and the appearance is impaired. In addition, the effect of the design can be improved without the inhalation chamber being seen by the bent portion of the louver.

[0007]

An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 2 is an overall side view of an outboard motor mounted on the stern plate of the hull. A lower casing 3 having a propeller 2 is connected below an upper casing 1, and an upper portion of the upper casing 1 is connected to a lower casing 3. An engine (not shown) covered by the bottom cowl 4 and the top cowl 5 is provided.

At the rear of the top wall of the top cowl 5, FIG.
As shown in FIG. 1, a step 6 is formed in a concave shape, and an intake cylinder 7 is protruded from the step 6. And in the above-mentioned step part 6,
An air intake cover 8 that covers the upper part of the intake cylinder 7 and forms the same surface as the outer surface of the top cowl 5 is mounted.

FIG. 1 is an enlarged sectional view of a portion of the top cowl 5 where an intake cylinder 7 is formed. An inner surface of an air intake cover 8 provided so as to cover a step 6 has a plurality of bosses 8a. , 8b projecting from the inside of the top cowl 5, the front mounting bolt 9a and the rear mounting bolt 9b
Are screwed onto the corresponding bosses 8a, 8b of the air intake cover 8 so that the air intake cover 8 is mounted on the top cowl 5, and the intake chamber 10 is located between the step 6 of the top cowl 5 and the air intake cover 8. Are formed.

By the way, the air intake cover 8 has an intake opening 11 formed in the rear side wall thereof.
A louver 12 composed of a plurality of guide plates arranged at predetermined intervals in the vertical direction is disposed in the intake opening 11. At the inner end side of each guide plate of the louver 12, that is, at the tip end on the intake chamber 10 side, a bent portion 12 a bent downward is formed, and the stepped portion 6 of the top cowl 5 is connected to the boss 8 b of the air intake cover 8. The air intake cover 8 is attached to the top cowl 5 by fastening the same together with the air intake cover 8 by inserting a rear mounting bolt 9b for mounting the air intake cover 8 therebetween.

During the operation of the outboard motor, the air flowing into the intake chamber 10 from the intake opening 11 flows into the top cowl 5 through the intake cylinder 7 and is supplied to the engine. However, in this case, the intake chamber 10
The air flowing into the louver 12 is bent downward by the louver 12.
After being bent downward by a, it flows into the intake chamber 10. Therefore, when the air flow is bent downward and the flow velocity falls, the air and the water are effectively separated, and only the air is introduced into the top cowl 5 from the upper open end of the intake cylinder 7.

On the other hand, the separated water is discharged to the outside of the air intake cover 8 from a gap on the outer periphery of the cover.

In the above embodiment, the louver 1
2, the louver 12 is divided for each guide plate 12b as shown in FIG. 4, and if the louver 12 is assembled integrally with the mounting bolt 9b,
The louver has a simple die-cut structure and can be manufactured at low cost.

[0015]

As described above, according to the present invention, a louver composed of a plurality of guide plates whose inner ends are bent downward is provided at the intake opening formed at the rear of the air intake cover. Since it is mounted by bolts, the air introduced into the top cowl is once bent downward by the bent portion of the louver. Therefore, the water that is going to flow in with the air is sufficiently separated from the air, and the water is completely prevented from flowing into the top cowl. In addition, since the louver is mounted together with the air intake cover by the air intake cover mounting bolts in a co-fastening manner, it is not necessary to provide a high boss or the like on the inner surface of the air intake cover, so that the appearance can be improved. Further, since the inner end side of the louver is bent downward as described above, the intake chamber is not directly seen from the intake opening, and the appearance can be improved.

[Brief description of the drawings]

FIG. 1 is an enlarged sectional view of an intake port of a top cowl of an outboard motor.

FIG. 2 is an external view of an outboard motor.

FIG. 3 is a vertical side view of a top cowl portion.

FIG. 4 is a view showing another embodiment of the louver.

[Explanation of symbols]

 Reference Signs List 4 bottom cowl 5 top cowl 7 intake cylinder 8 air intake cover 9a, 9b mounting bolt 10 intake chamber 11 intake opening 12 louver 12a bending section

Claims (1)

(57) [Claims] An intake cylinder protrudes from a top wall of a top cowl that covers an engine of an outboard motor, and is provided at an intake opening formed at a rear portion of an air intake cover disposed above the intake cylinder. A cowling for an outboard motor, wherein a louver comprising a plurality of guide plates whose inner ends are bent downward is attached by air intake cover mounting bolts.